US6070723A - Reclosable package and method - Google Patents
Reclosable package and method Download PDFInfo
- Publication number
- US6070723A US6070723A US09/228,183 US22818399A US6070723A US 6070723 A US6070723 A US 6070723A US 22818399 A US22818399 A US 22818399A US 6070723 A US6070723 A US 6070723A
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- US
- United States
- Prior art keywords
- door
- flanges
- pair
- disposed
- package
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D75/00—Packages comprising articles or materials partially or wholly enclosed in strips, sheets, blanks, tubes, or webs of flexible sheet material, e.g. in folded wrappers
- B65D75/28—Articles or materials wholly enclosed in composite wrappers, i.e. wrappers formed by associating or interconnecting two or more sheets or blanks
- B65D75/30—Articles or materials enclosed between two opposed sheets or blanks having their margins united, e.g. by pressure-sensitive adhesive, crimping, heat-sealing, or welding
- B65D75/32—Articles or materials enclosed between two opposed sheets or blanks having their margins united, e.g. by pressure-sensitive adhesive, crimping, heat-sealing, or welding one or both sheets or blanks being recessed to accommodate contents
- B65D75/321—Both sheets being recessed
- B65D75/323—Both sheets being recessed and forming several compartments
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D75/00—Packages comprising articles or materials partially or wholly enclosed in strips, sheets, blanks, tubes, or webs of flexible sheet material, e.g. in folded wrappers
- B65D75/28—Articles or materials wholly enclosed in composite wrappers, i.e. wrappers formed by associating or interconnecting two or more sheets or blanks
- B65D75/30—Articles or materials enclosed between two opposed sheets or blanks having their margins united, e.g. by pressure-sensitive adhesive, crimping, heat-sealing, or welding
- B65D75/32—Articles or materials enclosed between two opposed sheets or blanks having their margins united, e.g. by pressure-sensitive adhesive, crimping, heat-sealing, or welding one or both sheets or blanks being recessed to accommodate contents
- B65D75/321—Both sheets being recessed
- B65D75/322—Both sheets being recessed and forming one compartment
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D2585/00—Containers, packaging elements or packages specially adapted for particular articles or materials
- B65D2585/68—Containers, packaging elements or packages specially adapted for particular articles or materials for machines, engines, or vehicles in assembled or dismantled form
- B65D2585/6802—Containers, packaging elements or packages specially adapted for particular articles or materials for machines, engines, or vehicles in assembled or dismantled form specific machines, engines or vehicles
- B65D2585/6875—Containers, packaging elements or packages specially adapted for particular articles or materials for machines, engines, or vehicles in assembled or dismantled form specific machines, engines or vehicles engines, motors, machines and vehicle parts
- B65D2585/6882—Containers, packaging elements or packages specially adapted for particular articles or materials for machines, engines, or vehicles in assembled or dismantled form specific machines, engines or vehicles engines, motors, machines and vehicle parts vehicle parts
- B65D2585/6885—Containers, packaging elements or packages specially adapted for particular articles or materials for machines, engines, or vehicles in assembled or dismantled form specific machines, engines or vehicles engines, motors, machines and vehicle parts vehicle parts wiper blades
Definitions
- the present invention relates to a reclosable package and method of making the same and more particularly to a reclosable package having an integral reclosable door.
- reclosable packaging in an effort to help solve this problem. Yet, the reclosable packaging must also be able to display the article in the package, as well as any associated graphics on a card of the package, in a manner that is aesthetically pleasing to a prospective purchaser while permitting access to the article in a manner that allows the article to be removed from the package.
- many types of reclosable packaging have a forwardly facing access opening covered by a front-opening door connected by a hinge to another part of the packaging.
- One known method of keeping the door closed over the access opening is to use an adhesive label, such as in the manner disclosed in U.S. Pat. No. 4,930,627.
- Another known method of keeping the door closed is to use interlocking dimples that releasably secure the door to another portion of the packaging such that the door is retained by the dimples in the closed position.
- a door that is to be held in the closed position by these dimples is formed entirely from a front-half or rear-half of the package such that the package is a clamshell configuration.
- a card received in a track in the packaging can be slid between an open position uncovering the opening and a closed position covering the opening.
- a label such as a tamper-proof or tamper-evident label or another aid that undesirably requires an additional manufacturing step is used to keep the door or card over the opening from moving away from the closed position.
- What is needed is a reclosable package into which an article can be reinserted and returned to a store shelf or display area without a prospective customer detecting that the package and article were previously returned. What is needed is an access door that does not require a label or the like to keep it closed. What is also needed is a reclosable package where articles, including articles longer than the package width, can easily be removed from and inserted into the package from one end. What is further needed, is a package that achieves at least some or all of these objectives while being quick, simple, and inexpensive to manufacture.
- a reclosable package having an integral reclosable door at one end that permits an article in the package to be removed out the package end when the door is opened and which can be easily returned to and retained in the closed position.
- the package has a bubble-shaped blister body made of a thin and resilient thermoformed material that is mounted to a backing body made of a thin and resilient thermoformed material that has a rib, that preferably extends about its periphery, to help impart stiffness and crush resistance.
- the rib has a notch that weakens the rib at or adjacent the location of the desired fold line.
- the door has a lip that contacts and preferably engages a portion of the package such that an interference fit is created between them that opposes release of the door from the closed position without manual application of sufficient force.
- a preferred package embodiment is comprised of a pair of joined package halves both made of a resilient thermoformable material with one of the package halves serving as a backing body and the other of the package halves being constructed with a bubble-like body and serving as a blister.
- the rib and door are integrally formed in one of the package halves with the rib and door preferably formed in the backing body package half.
- the backing body can be made of a relatively thin thermoformable material with the rib imparting sufficient rigidity and crush resistance such that a thicker non-elastomeric card is not needed.
- the backing body preferably is formed of a sheet of thermoformable material with the rib extending about its periphery that is, in turn, located inboard of a peripheral flange.
- the flange has a first flange section that is located on one side of the notch and which extends about a portion of each side of the backing body and along one of its ends.
- a second flange section is located on the other side of the notch and preferably extends around three sides of the door.
- Each flange section preferably has two portions that extend generally longitudinally relative to the package and one portion that extends generally transversely.
- the longitudinally extending flange portions of the second flange section are disposed at an angle relative to the longitudinally extending flange portions of the first flange section such that the first and second flange sections do not lie in the same plane.
- the rib has a pair of spaced apart generally longitudinally extending sections and a pair of spaced apart generally transversely extending sections.
- Each longitudinally extending section is notched at or adjacent the desired fold line dividing the section into a first portion on one side of the notch and a second portion on the other side of the notch.
- each notch comprises a generally transversely extending hinge rib that preferably has a generally triangular cross section. Where needed, a web of material can extend across an apex of the notch.
- the hinge ribs are spaced about the same distance from each package end to ensure that the fold line is disposed between the package ends in a generally transverse direction relative to the lengthwise direction of the package. When the door is closed, one of the rib portions is disposed at an angle relative to the other of the rib portions with one of the transversely extending rib sections disposed at a different elevation relative to the other of the transversely extending rib sections.
- the blister body is formed such that it has a pair of spaced apart generally longitudinally extending sidewalls and a pair of spaced apart transversely extending endwalls.
- the sidewalls are tapered such that the height of the adjacent endwall becomes increasingly less than the height of the opposite endwall.
- the beginning of the tapered portion of each sidewall is at or adjacent the fold line and borders part of the door when the door is closed.
- the peripheral flange has a pair of spaced apart generally longitudinally extending sidewall sections and a pair of spaced apart endwall sections.
- Each sidewall flange section is comprised of a first planar flange portion and a second planar flange portion with the first planar flange portion and the second planar flange portion meeting at or adjacent the fold line and disposed at an angle relative to each other. If desired, each planar flange portion adjacent the door can taper inwardly away from the sidewall to help frictionally capture and retain the door when the door is closed.
- the door has an upraised portion and a front lip that preferably engages with the shorter endwall of the blister body creating interference fit therebetween such that when the door is closed it remains closed absent the application of sufficient force.
- the angle of the lip and the angle of the endwall are substantially parallel to help create the interference fit.
- the lip and endwall angle is generally perpendicular to one or both outer walls of the backing body and the blister body.
- a snap fit is created between the door and endwall when the door is closed.
- the door has a portion of a flange that forms a first hanger tab in which there is a hanger hole.
- the backing body preferably also has a portion of a flange that extends parallel to the first hanger tab and forms a second hanger tab.
- the second hanger tab preferably also has a hanger hole. The tabs overlap with the holes generally in alignment for both receiving a peg of a display board. When hung from a peg, the peg preferably helps prevent the door from opening by itself.
- a relatively thin, flexible and resilient material can be used having a thickness of no greater than about 0.050 inches.
- Such a package construction advantageously minimizes flange width such that the width of the article-receiving cavity is nearly the same as the total width of the package.
- the peripheral flange width at the sides of the package is no greater than about 1/8 of an inch and preferably no greater than about 3/32 of an inch.
- the article is a windshield wiper blade or wiper blade refill having a length greater than package width and typically two or more times the package width.
- the package can be made to fit a peg-type display board having pegs spaced about one inch on center, i.e about two inches apart.
- the outer walls of the backing body and the blister body are not opaque to permit a prospective purchaser to see through at least part of the outer package walls.
- the package has a card containing graphics and text received in the cavity that is disposed between an article in the cavity and one of the outer walls.
- the package is hung by a peg such that the card is immediately facing or exposed to the prospective purchaser.
- the card completely or partially obscures the article and is located between a prospective purchaser and the article in the package.
- the opposite outer wall preferably can have indicator indicia and can have labels formed in the wall to help the prospective purchaser estimate the length of the article in the package or a used article brought by the prospective purchaser that the prospective purchaser is seeking to replace.
- sheets of a thermoformable material are thermoformed such that one of the sheets has forms a blister having a construction similar to or the same as that described above and the other of the sheets forms a backing body having a construction similar to or the same as that described above.
- the flanges of the blister are trimmed in a multilevel trimming operation that such that trimming of the flanges occurs in more than one plane.
- the flanges of the backing body are trimmed.
- the backing body trimming operation can also be a multilevel trim operation.
- the blister body After trimming, the blister body is positioned so as to receive an article in its cavity. After the article is received in the cavity, the backing body and blister body are brought together such that one of the portions of each sidewall flange section of the blister body contacts the first flange section of the backing body and they are sealed together. The flange portions about the door are not sealed to each other to permit the door to be opened and closed.
- the one sidewall flange portion and the first flange section are joined together by a high energy density welding process that can employ a beam of the energy.
- the welding process is a radio frequency ("RF") welding process that also creates a tear seam.
- RF radio frequency
- a card that can contain graphics and text is placed in the cavity against the outer wall of the blister body before the article is placed in the cavity.
- the card can be retained against or adjacent the outer wall by a plurality of pairs of fingers that extend into the cavity and which can be integrally molded into the sidewalls during thermoforming.
- thermoformable material it is still another object of the invention to use thin, resilient, and flexible thermoformable material to produce a package that does not need a flat, thicker blistercard of conventional cardboard or rigid plastic construction for support and rigidity.
- the backing body has a peripheral rib to impart structural rigidity and crush resistance to the package to enable relatively thin material, as thin as 0.050 inch or thinner, to be used to form the backing body.
- the flanges are so thin such that the article-receiving cavity width is nearly as wide as the total package width.
- peripheral flanges can be made 3/32 of an inch or narrower to minimize total package width.
- a reclosable package that is rugged, simple, flexible, reliable, and durable, and which is of economical manufacture and is easy to assemble, install, and use.
- Other objects, features, and advantages of the present method of the invention include a method of making a reclosable package that is fast, inexpensive, versatile, reduces scrap, minimizes labor required, produces a package having a maximum cavity for a given width, and which is easy to implement and use.
- FIG. 1 is a perspective view of a reclosable display package of this invention
- FIG. 2 is an enlarged fragmentary front plan view of one portion of the package
- FIG. 3 is an enlarged fragmentary side view of the package portion
- FIG. 4 is an enlarged fragmentary front plan view of another portion of the package.
- FIG. 5 is an enlarged fragmentary side view of the other portion of the package.
- FIG. 6 is an enlarged fragmentary side view of a package with both portions assembled illustrating a reclosable door of the package in a closed position and in an open position;
- FIG. 7 is an enlarged fragmentary side view of that package portion which receives the door
- FIG. 8 is an exploded side view of one preferred package assembly and packaging application
- FIG. 9 is an exploded side view of the package assembly after it has been assembled.
- FIG. 10 depicts a pair of packages of this invention hung on spaced apart pegs of a display
- FIG. 11 is a side view of a web of material used in making a package of this invention being drawn between to dies of a thermoforming apparatus;
- FIG. 12 is a cross-sectional side view of the apparatus thermoforming a portion of the package
- FIG. 13 illustrates a plurality of pairs of sets of thermoformed package portions with each set having a plurality of pairs of package portions
- FIGS. 14 and 15 illustrate one of the sets of package portions after a trimming operation has been performed
- FIG. 16 illustrates a plurality of pairs of sets of another of the thermoformed package portions with each set having a plurality of pairs of package portions
- FIGS. 17 and 18 illustrate one of the sets of the package portions after a trimming operation has been performed
- FIG. 19 illustrates loading cards and articles into the package portions of one set and assembling one set of package portions to another set of package portions
- FIGS. 20 and 21 illustrates joining one set to another set to form three packages
- FIG. 22 illustrates a tear seal or tear weld joining the sets together to form the three packages.
- FIGS. 1-7 illustrate a reclosable package 30 of this invention that has an access door 32 adjacent one end that is self-retaining in a closed position (FIG. 1) to retain an article or multiple articles within the package and which can be moved to an open position (FIG. 7) to advantageously permit withdrawal of one or more articles 34 from one end of the package 30.
- a package construction is particularly advantageous where an article 34 received in the package is long, longer than the width of the package 30, such that it is desirable, if not necessary, to remove or dispense the article 34 from one end of the package 30.
- the package 30 comprises a body made of a pair of halves 36 and 38 joined together nearly about the entire periphery of the package 30 except for adjacent the door 32.
- the door 32 is carried by one of the package halves and is located at or adjacent one end of the package body. Although two halves joined together are shown in the drawing figures, the package 30 can comprise more than two halves or portions that are joined together.
- a first package half 36 shown in more detail in FIGS. 2 and 3, is a bubble-shaped blister body that has an upper generally transversely-extending sidewall 40, a lower generally transversely-extending sidewall 42, and a pair of longitudinally-extending sidewalls 44 and 46 that bound an outer wall or outer surface 48 and define an article-receiving cavity 50 (FIG. 3).
- FIG. 2 also shows a rounded transition region 52 between each of the sidewalls 40, 42, 44 and 46 and the wall 48 that can bound the periphery of the wall 48.
- a flange 54 extends outwardly about the periphery of the sidewalls 40, 42, 44, and 46 and forms at least a portion of a surface to which another package half, such as package half 38, is joined. When in the closed position, a portion of the door 32 bears against the upper sidewall 40 causing the door 32 to be releasably retained in the closed position.
- the flange 54 has three sections 56, 58 and 60.
- a first flange section 56 extends about the periphery of the lower sidewall 42 and portions of both longitudinally extending sidewalls 44 and 46.
- the first flange section 56 preferably is planar or substantially planar, i.e. generally flat, and provides all or substantially all of the surface to which another package half, such as package half 38, is joined.
- a second flange section 58 is disposed at an acute angle, ⁇ , relative to the first flange section 56.
- the second flange section 58 is located immediately adjacent the first flange section 56 in the region of the door 32.
- the second flange section 58 extends outwardly from a portion of both longitudinally extending sidewalls 44 and 46 adjacent the door 32 and from the upper sidewall 40.
- the second flange section 58 is also planar but is not coplanar with the first flange section 56.
- the plane in which the second flange section 58 lies is disposed at angle, ⁇ , relative to the plane in which the first flange section 56 lies.
- ⁇ is about 30° but can range between about 20° and about 45°. Such a preferred angle and angular range are not merely design choices. Rather, as will be discussed in more detail herein, the preferred angle and angular range help enable the door 32 to be retained in the closed position by the package half 36.
- a third flange section 60 extends outwardly from the second flange section 58 away from the upper sidewall 40 at the end of the package half 36 adjacent the door 32.
- the third flange section 60 can form a mounting tab from which the package 30 can be suspended.
- the third flange section 60 can be disposed in the same plane as the second flange section 58 but can be disposed at an angle relative to the plane of the second flange section 58 so that the package 30 can be hung from a vertical mounting surface, such as a wall or the like, such that the upper sidewall 40 is on top, the lower sidewall 42 is on the bottom, and at least one of the package halves 36 and 38 is disposed in a particular desired direction such as shown.
- the third flange section 60 can be two-dimensionally or three-dimensionally contoured. As is shown in FIG. 4, the third flange section 60 can be parallel or substantially parallel to the first flange section 56. Where it is desired to hang the package 30, to accommodate a peg 62 (shown in phantom in FIG. 1) or the like of a mounting assembly, such as a mounting assembly used in a store, the tab preferably has a hole 68 through which the peg 62 extends.
- the package half 36 has a plurality of pairs of opposed and spaced apart fingers 66 that extend inwardly from each longitudinally-extending sidewall 44 and 46.
- the fingers 66 are spaced from the wall 48 by a distance that is about the thickness of the card 64 or greater.
- the fingers 66 are integrally formed from part of one or both of the sidewalls 44 or 46. If desired, each of the fingers 66 can comprise an indention in one or both of the sidewalls.
- the width of the cavity 50 can remain the constant along the length of the package half 36, it can narrow slightly adjacent the door 32 to help releasably capture the door 32 in the closed position and to help laterally support the door 32 when the door 32 is in the closed position.
- the narrowing of the cavity 50 preferably is accomplished by inwardly tapering each sidewall 44 and 46 at or adjacent the end of the package 30 that is disposed adjacent the door 32.
- FIGS. 4 and 5 each illustrate a portion of a second package half 38 in more detail.
- the package half 38 comprises a backing body that has a longitudinally extending outer wall or surface 70 that is bounded about its periphery by (a) a recessed channel 72 that preferably functions as a rib to help impart stiffness and strength to the package half 38 and (b) an outwardly extending flange 74 that has at least a portion of it joined to the flange 54 of package half 36.
- the package half 38 also carries the door 32.
- the door 32 is integral with the package half 38.
- the door 32 is generally defined by that portion of package half 38 that lies above fold line 82.
- the flange 74 of package half 38 has at least two flange sections and preferably has three flange sections 76, 78 and 80.
- a first flange section 76 extends transversely about an end of the outer wall 70 that is spaced from the door 32 and longitudinally along side of the wall 70 preferably terminating along a hinge line or fold line 82 of the door 32.
- the first flange section 76 is planar or substantially planar and, as is depicted in FIG. 5, can be coplanar or substantially coplanar with the wall 70.
- the first flange section 76 of package half 38 is joined to the first flange section 56 of package half 36 such that the two halves 36 and 38 form a package 30 or a substantial portion thereof.
- the flange sections 56 and 76 can be adhesively joined or sealed together, joined using heat, or joined using an energy welding method. Examples of suitable energy welding methods include RF welding and ultrasonic welding. In a preferred method of assembling a package 30 of this invention discussed in more detail below, the flanges 56 and 76 are preferably joined or sealed together by RF welding.
- a second flange section 78 extends outwardly along each side of the door 32 and can extend along an end of the package half 38 adjacent the door 32.
- the second flange section 78 is also planar or substantially coplanar, i.e. generally flat, with it being disposed at an acute angle, ⁇ , relative to the plane of the first flange section 76 when the door 32 is closed.
- ⁇ is about 30° when the door 32 is closed and can range between about 20° and about 45°.
- the aforementioned are not mere design choices but help ensure that, for a given length of flange section 78 (i.e., length of door 32 in a direction generally parallel to a longitudinal axis of the package 30), the top wall 40 of package half 36 will interfere with the motion of the door 32, such as is depicted in FIG. 6, when in the closed position to help retain the door 32 in the closed position.
- the interference fit created between the door 32 and wall 40 also opposes release of the door 32 from the closed position when it pivots generally about fold line 82 when being opened.
- the second flange section 78 of package half 38 is not joined or sealed to the second flange section 58 of package half 36 to permit the door 32 to be moved toward and away from package half 36. As is shown in FIGS. 1 and 6, when the door 32 is closed, the second flanges 58 and 78 lie adjacent each other generally in an overlapping relationship and can bear against each other.
- the third flange section 80 extends outwardly from the package half 38 beyond the end of the package half 38 adjacent the door 32.
- the third flange section 80 can be planar but can be two-dimensionally or three-dimensionally contoured.
- the third flange section 80 comprises a mounting tab and has a through-hole 84 that preferably is a hanger-hole for receiving a peg 62 or the like.
- a label 86 such as a tamper-proof or tamper-evident label, can be placed on the package 30 such that it contacts both third flange sections 60 and 80 in a manner that keeps the flange sections 60 and 80 together and the door 32 closed.
- flanges 78 and 58 or flanges 60 and 80 can be staked 87 to hold the door 32 in the closed position until pulled apart with sufficient force to break the stake.
- the recessed channel 72 forms two groups of ribs 88 and 90 that together encircle substantially the entire the periphery of package half 38 except for adjacent the fold line 82.
- a first group of ribs 88 has a pair of longitudinally extending ribs 92 and 94 that are interconnected by a transversely extending rib 96.
- Each of the ribs 90, 92 and 94 of the first group 88 is defined by a bottom 98 and a pair of sides 100 and 102.
- the sides 100 and 102 preferably are angled such that the width of the bottom 98 is narrower than the opening or mouth of the rib.
- the sides 100 and 102 have a draft angle of at least about 7° and no greater than about 15°. In a preferred embodiment, the sides 100 and 102 have a draft angle of about 10°.
- a second group of ribs 90 extends around three sides of an upraised portion 104 of the door 32.
- the second rib group 90 has a pair of spaced apart longitudinally extending ribs 106 and 108 that are interconnected by a generally transversely-extending front rib 110.
- Each of the longitudinally-extending ribs 106 and 108 have a bottom 112 and a pair of sides 114 and 117 that are similar to the ribs of the first group 88.
- the transversely extending front rib 110 has bottom 120 spacing apart a front wall 122 and a rear wall 123.
- Each of the longitudinally extending ribs 106 and 108 are generally aligned with one of the longitudinally extending ribs 92 and 94 of the first group 88.
- Each aligned rib pairs 92, 106 and 94, 108 is divided by a notch 113 and 115 at or adjacent the fold line 82.
- Each notch 113 and 115 has a pair of surfaces 116 and 118 inclined relative to the bottom of each the ribs 92, 106, 94 and 108 that generally converge at the fold line 82 to form a hinge rib 113 and 115 that is generally transverse to the longitudinally extending ribs 92, 94, 106 and 108.
- Each transverse hinge rib 113 and 115 has a generally triangular or notched cross-sectional shape to introduce a region of weakness in the rib pairs 92, 106 and 94, 108 that encourages the door 32 to bend at, along, or very near a desired fold line 82 when sufficient force is applied to the door 32 to urge the door 32 away from the closed position and toward an open position that is a position disposed from the closed position.
- an integral living hinge is formed in the region of the fold line 82.
- each hinge rib 113 and 115 When the door 32 is closed, the inclined surfaces 116 and 118 of each hinge rib 113 and 115 form an angle, ⁇ , that is between about 80° and about 90° and preferably no greater than about 60° as this advantageously enables simpler more inexpensive tooling to be used. If desired, the door 32 can be constructed such that the inclined surfaces 116 and 118 actually overlap and contact each other such that ⁇ approaches 0°. Where package half 38 is formed by a thermoforming process, the inclined surfaces 116 and 118 of each hinge rib 113 and 115 can be joined by a web 130 of material, such as is depicted in phantom in FIG. 6.
- one or both of the walls 48 and/or 70 can have indicator indicia in the form of spaced apart marks 126 and labels 128 that identify the significance of the marks 126, namely length.
- a prospective purchaser can bring a used article they are seeking to replace and compare it with the length of the article 34 in the package 30 and can do using the marks 126 as a reference.
- both the marks 126 and labels 128 are integrally formed into the walls 48 and/or 70 such that the marks 126 and labels 128 are upraised, indented, or otherwise three-dimensionally contoured.
- the outer wall 70 of package half 38 has a plurality of rows of marks 126 each spaced apart by a desired distance or increment.
- each of the marks 126 is spaced apart from an adjacent mark 126 by about an inch with measurement labels 128 located adjacent one of the marks 126 approximately every two inches.
- the marks 126 are spaced apart about twenty-five millimeters (mm) with labels 128 located about every fifty mm.
- FIGS. 6 and 7 illustrate the construction and operation of the door 32 in more detail.
- the upraised portion 104 of the door 32 is comprised of a front surface 124 that forms one of the walls of recessed transverse rib 110, a pair of side surfaces 114 that each form one of the walls of one of the longitudinally-extending ribs 106 and 108, and an outer surface 132.
- the outer surface 132 of the door 32 is planar or substantially planar and preferably is parallel or substantially parallel to outer wall 70 of package half 38 when the door 32 is closed.
- the door 32 advantageously can be constructed to form an integral part of the package 30 when it is closed.
- the door 32 is retained in the closed position by an interference fit between the front wall 122 of the door 32 and the upper transversely-extending sidewall 40 of package half 36.
- the door 32 is retained in the closed position because, as exemplified by a ray 134 that extends from the fold line 82 to that portion of the door 32 spaced the farthest away from the fold line 82, i.e. an outer edge 136 of the front wall 122, when the door 32 is urged in the direction indicated by arrow 140, the outer edge 136 not only contacts the interior surface of sidewall 40 but actually urges the sidewall 40 slightly outwardly away from the edge 136. Because the sidewall 40 preferably is composed of a resilient material, it returns to the position shown in FIG.
- the door 32 is constructed such that the length of ray 134 would cause a part of the front wall 122 to pass through the sidewall 40 when opening the door 32, if the sidewall 40 was not resilient.
- the angle, ⁇ , formed between the sidewall 40 and the outer wall 48 of package half 36 is between about 89° and about 91° and preferably is about 90° and (b), as is shown in FIG. 6, the front wall 122 is parallel or substantially parallel to the sidewall 40.
- the front wall 122 is also disposed within about 89° and about 91° of the sidewall 40 to ensure creation of an interference fit when the door 32 is closed.
- the interference fit is a snap fit such that a person closing the door 32 feels it snap into place when sufficient force is applied and it reaches the closed position.
- a person In operation of the door 32 with the package 30 removed from any peg it was hung from, a person simply manually grasps tab 80 and pulls it away from tab 60. When the force pulling the tabs 60 and 80 apart exceeds the force of the interference fit keeping the door 32 in the closed position, sidewall 40 will flex outwardly at least slightly thereby permitting the door 32 to move relative to the sidewall 40 and package half 36. Thereafter, application of force causes the door 32 will rotate about the fold line 82 and move farther away from package half 36 exposing an access opening 142.
- the access opening 142 is large enough to permit the person to reach into the package and retrieve the article 34.
- the package 30 can be tipped so that the access opening faces at least somewhat downwardly to allow gravity to urge the article 34 from the package 30.
- one or more articles can be inserted through the opening 142 into the package 30.
- force can be applied directly against the door 32 or to the tab 80 to urge the door 32 in a direction generally opposite arrow 140.
- edge 136 of wall 122 contacts the edge 138 of wall 40, its inclined construction (FIG. 5) causes the edge 136 to function as a wedge or ramp to help urge wall 40 slightly outwardly so as to receive the rest of the door wall 122.
- further application of force causes additional relative movement between the walls 40 and 122 to occur until an audible "snap" is heard providing feedback that the door 32 is closed.
- the appearance of the package 32 preferably is virtually indistinguishable from when it was first used.
- the door 32 can be opened and closed several times, at least 15 times, without its appearance changing, particularly in the region of the fold line 82.
- FIGS. 8-10 illustrate one preferred reclosable package assembly. Its assembly is shown in FIG. 8, a card 64 is received in the cavity 50 and disposed adjacent the outer wall 48 of package half 36. As is shown in FIG. 9, the card 64 can be constructed with a leg 148 that is disposed at an angle relative to the rest of the card 64. At least one article 34 is disposed in the cavity 50 adjacent the card 64 and the other package half 38 is placed over package half 36 with its flanges 76 in contact with the flanges 56 of package half 36. The flanges 56 and 76 are to complete the assembly of the package 30. Flanges 58, 78 and 60, 80 are not sealed or joined to permit the door 32 to be opened and closed.
- the length, L, of the article 34 preferably is longer than the width, W (FIG. 2), of the package 30.
- the door 32 being disposed at one end of the package 30 makes the package 30 particularly well suited for dispensing articles that are relatively long.
- the package 30 is a wiper blade package or a wiper blade refill package with the article 34 being a wiper blade or wiper blade refill that has a length, L, that is at least five times the width, W, of the package 30 and can have a length, L, that is as much as twenty times or more the width, W, of the package 30.
- FIG. 9 illustrates a side view of the package 30 hung from a peg 62 of a display rack 144, such as what is commonly used in a retail store.
- the outer wall 48 of package half 36 is disposed toward a prospective purchaser 146 with the card 64 located between the prospective purchaser 146 and the article 34. So that the card 64, including any graphics and text on the card 64, can be viewed by a prospective purchaser 146, at least a portion of the outer wall 48 is not completely opaque and preferably is substantially clear. In a preferred package embodiment, the entire outer wall 48 is clear.
- the prospective purchaser 146 can inspect the article 34 in the package 30, at least a portion of the outer wall 70 of package half 38 is not completely opaque and preferably is substantially clear. In a preferred package embodiment, the entire outer wall 70 is clear. As a result of being clear, a prospective purchaser 146 can place a used article he or she is seeking to replace against or adjacent the wall 70 and compare it with or against the article 34 in the package 30. If desired, the prospective purchaser 146 can use the marks 126 and labels 128 for reference to determine the length of the article 34 in the package 30 as well as to determine the length of a used article.
- FIG. 10 illustrates a pair of spaced apart packages 30 that are each hung from a peg 62.
- the width, W, of each package 30 is such that the pegs 62 can be hung a distance, d, of about two inches apart.
- the width, W, of the package 30 preferably is no greater than two inches and preferably is less than two inches.
- the package width, W is about 1.850 inches from outer edge to outer edge of the package 30 thereby enabling the pegs 62 to be optimally spaced apart a distance, d, of about two inches maximizing the amount of packages 30 that can be hung from a display rack or display board and which are in view of a prospective purchaser. Consequently, retail product density is maximized which advantageously helps a retailer to maximize sales and minimize display space where nothing can be displayed.
- one or both package halves 36 and 38 are constructed of a flexible and resilient material that preferably is a plastic.
- both package halves are constructed of polyvinyl chloride ("vinyl”) or polyethylene tetraglycol ("PETG"). Vinyl and PETG are particularly preferred where the package halves 36 and 38 are joined using a RF welding process.
- the package 30 is used to hold one or two windshield wiper blades or wiper blade refills 34.
- package is at least about twenty and one-half inches long from endwall 40 to endwall 42 and the package has a width, W, of less than about two inches so it can be hung on pegboard having adjacent pegs 62 spaced about an inch apart.
- the package 30 is about twenty-five and one-half inches in length to accommodate wiper blades and refills that can be up to twenty-four inches in length.
- Each package flange about the periphery preferably is at least about one-sixteenth of an inch wide and preferably is about three thirty-seconds of an inch wide.
- the tabs 54 and 74 each extend at least one-quarter inch from end wall 40 and preferably, both extend about three-quarters of an inch from the end wall 40.
- the package 30 has a depth from outer wall 70 to outer wall 48 of at least about three-eighths of an inch and preferably is about five-eighths inch deep.
- the length of the door 32 from the fold line 82 to its bottom edge 136 is about one inch.
- the width of the lip 122 from flange 80 to edge 136 is at least about one-sixteenth inches wide and preferably is about one-eighth inch wide.
- each rib sidewall from the rib bottom wall to its adjacent flange is at least about one-sixteenth inches wide and preferably is about three-sixteenths of an inch wide.
- each package half 36 and 38 is made of clear vinyl having a thickness of no greater than about 0.050 inches.
- FIGS. 11-21 illustrate a novel method of making a package 30 of this invention having a reclosable door 32.
- FIG. 11 illustrates a web of material 150, such as vinyl or PETG, that is unrolled from a roll 152 carried by a mandrel 154.
- the web 150 is drawn by an extended pin roller chain 156 between an upper die or platen 158 and a lower die or platen 160 of a thermoforming press 162.
- the material of the web 150 preferably is relatively thin.
- the material of the web 150 preferably can be as thick as about 0.050 inches or as thin as about 0.0075 inches.
- the cross sectional thickness of the web 150 is no greater than about 0.050 inches such that the flanges, the ribs, the outer surfaces, and sidewalls have a cross-sectional thickness no greater than about 0.050 inches.
- the recessed rib construction of this invention that extends about the periphery of outer surface 70, the recessed rib helps structurally rigidify the outer wall 70 and helps the package 30 resist crush.
- the card 64 can be made of thinner, less expensive material.
- the card 64 can comprise an adhesive label applied to the interior surface of outer wall 70.
- FIG. 12 illustrates thermoforming of a package half, such as package half 36 or package half 38, in the press 162.
- a package half such as package half 36 or package half 38
- the web 150 With the web 150 received between the two platens 158 and 160, one of the platens 158 is brought toward the other of the platens 160 such that each platen 158 and 160 preferably comes into contact with the web 150.
- a substantially gas-tight seal is created between the platens 158, 160, and the web 150.
- Heat is applied to the web 150 to soften the web 150 to facilitate its forming.
- the web 150 preferably is heated so it reaches a temperature of at least about 250° Fahrenheit such that the web 150 can be formed into a desired shape and the desired shape retained when at a lower temperature.
- a vacuum is applied to a lower die cavity 164 causing that portion of the heated web 150 overlying the cavity 164 to be drawn into the cavity 164 such that its contour substantially conforms to the three-dimensionally contoured surface of the cavity 164.
- the lower platen 160 has a manifold 166 connected by a line 168 to a vacuum source (not shown) that communicates the vacuum to a plurality of pairs of vacuum ports 170 that each, in turn, communicate with the cavity 164.
- the upper platen 158 can have a chamber 172 into which a gas, that also can be heated, is introduced to create a positive pressure that urges the web 150 into the lower die cavity 164 to help speed thermoforming.
- the upper platen 158 can have a portion (not shown) that protrudes from the platen 158 into the lower die cavity 164 to mechanically force a portion of the web 150 into the cavity 164 during thermoforming. After a suitable dwell time, one or both platens 158 and 160 are cooled to cool the formed web 150 to fix its shape and then one or both platens 158 and 160 are moved away from each other to permit the formed web 150 to be advanced beyond the thermoforming press 162.
- FIG. 13 illustrates three sets 174, 176 and 178 of package halves 36 formed in the web 150 with each set having a plurality of pairs of package halves.
- the formed web 150 advances to a trim station where a trimming operation is performed to separate each set of formed halves from the web 150.
- a trim operation can be performed using a vertical trim press such as a Lyle, model 130P2-32, trim press made by Lyle Industries, Inc., of 4144 West Lyle Road, Beaverton, Mich. 48612.
- the hanger hole 68 preferably is also formed during the trim operation.
- the trim machine preferably has a lower die that cradles the sets 174, 176 and 178 and an upper cutting die with one of the dies brought toward the other of the dies to cut each set 174, 176 and 178 along dashed line 180.
- FIGS. 14 and 15 illustrates a side view of one of the package sets 174 after the trim operation is completed.
- the trim operation is performed along the flanges 56, 58 and 60 of the package halves 36 of the set 174 and is a multilevel trim operation because the trim must be performed along more than one trim plane. More specifically, a first trim plane is located along flange 56 and a second trim plane is located along flange 58.
- Each trimmed set can be stacked in another set and stored to await final assembly, if desired. If desired, a plurality of pairs of trimmed sets can be stacked and shipped for final assembly at another location.
- FIG. 16 Another web 150 containing three sets 182, 184 and 186 of formed package halves 38 is shown in FIG. 16.
- a multilevel trim operation is performed to cut each set 182, 184 and 186 along dashed line 188 such that when the trim operation is finished, each set appears generally as shown in FIGS. 17 and 18.
- the trim operation preferably can be a multilevel trim operation because the flanges 76, 78 and 80 being trimmed can lie in different planes.
- the flange 78 of the door 32 and the flange 76 of the remainder of the body of the package half 38 lie in different planes.
- Such a multilevel trim operation is critical to enabling a reclosable door 32 to be formed at one end of the package 30 as it facilitates location of the notch 113 and 115 between the longitudinal ribs 92, 106 and 94, 108 and permits layout of the door 32 such that the outer surface 132 of its upraised portion 104 is an extension of wall 70 and can lie in the same plane as wall 70.
- FIGS. 18-22 illustrates a method of assembling a pair of sets 174 and 182 of package halves 36 and 38 to form three of the packages 30.
- One of the sets, in this case, set 174 is located and cradled in a lower fixture 190.
- a card 64 is placed in each cavity 50 of each package half 36.
- An article 34 is thereafter placed in each cavity 50 of each package half 36 on top of the card 64.
- the packages 30 can be assembled without any card 64.
- the other of the sets in this case, set 182 is brought over set 174 and brought toward set 174.
- set 182 is carried by an upper fixture 192 (FIG. 20) using suction.
- the sets 174 and 182 are brought together such that the ribs 92, 94, 96, 106,108, and 110 of each package half 38 are disposed interiorly of the sidewalls of a respective package half 36 helping to locate the package halves 38 relative to the package halves 36 such that they fit together properly.
- the sets 174 and 182 are brought together until flanges 56 and 76 overlap and bear against each other.
- flanges 58 and 78 also overlap and bear against each other.
- the fixtures 190 and 192 are brought together and energy is radiated from a portion of one or both fixtures generally in the regions identified by reference numerals 193 and 194 to heat flanges 56 and 76 such that at least a portion of flange 56 fuses with a portion of flange 76, joining them together.
- the fixtures 190 and 192 are constructed such that flanges 58 and 78 adjacent the door 32 are not sealed or otherwise joined to permit the door 32 to be opened and closed. If desired, because of the previously described trimming operation, the fixtures 190 and 192 need not overlie flanges 58 and 78.
- a dashed line 196 indicates where the flanges 56 and 76 are fused or sealed together.
- the process used to fuse the flanges 56 and 76 is a RF welding process that creates a relatively narrow seam at line 196.
- the seam 196 is a tear-type seam that can produce a flange no wider than about 1/8 of an inch and preferably no wider than about 3/32 of an inch such that the RF welding process advantageously minimizes the width of the flanges 56 and 76 enabling the total package width, W, to be desirably minimized.
- the usable volume inside the article receiving cavity 50, in which one or more articles 34 can be retained is also maximized as the width of the cavity 50 advantageously approaches the total package width, W. Because of minimizing package width, W, while maximizing the useable volume of the article-receiving cavity 50, the density of the packages 30 in a retail display space can also advantageously be maximized.
- the fixtures 190 and 192 are spread apart and a set 198 of three fused packages 30 is removed.
- An automatic or manual tearing operation is performed to separate each of the packages 30 from the other of the packages 30 along the tear seam 196.
- three completed packages 30 (FIG. 1) of this invention are formed.
Abstract
Description
Claims (60)
Priority Applications (3)
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AU43245/00A AU4324500A (en) | 1999-01-11 | 2000-01-11 | Reclosable package and method |
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US09/228,183 US6070723A (en) | 1999-01-11 | 1999-01-11 | Reclosable package and method |
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WO2000043275A2 (en) | 2000-07-27 |
AU4324500A (en) | 2000-08-07 |
WO2000043275A3 (en) | 2000-09-28 |
WO2000043275A9 (en) | 2001-07-12 |
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